EP0440840B1 - Procédé de préparation de copolymères d'éthylène à haute résistance à l'impact - Google Patents

Procédé de préparation de copolymères d'éthylène à haute résistance à l'impact Download PDF

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Publication number
EP0440840B1
EP0440840B1 EP90102276A EP90102276A EP0440840B1 EP 0440840 B1 EP0440840 B1 EP 0440840B1 EP 90102276 A EP90102276 A EP 90102276A EP 90102276 A EP90102276 A EP 90102276A EP 0440840 B1 EP0440840 B1 EP 0440840B1
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EP
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Prior art keywords
weight
copolymer
parts
monomer
peroxide
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EP90102276A
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German (de)
English (en)
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EP0440840A2 (fr
EP0440840A3 (en
Inventor
John Dr.Dipl.-Chem. Hobes
Wolfgang Dr.Dipl.-Chem. Payer
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Hoechst AG
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Hoechst AG
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Priority to AT90102276T priority Critical patent/ATE126809T1/de
Priority to DE59009556T priority patent/DE59009556D1/de
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Publication of EP0440840A3 publication Critical patent/EP0440840A3/de
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D123/00—Coating compositions based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Coating compositions based on derivatives of such polymers
    • C09D123/02—Coating compositions based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
    • C09D123/04—Homopolymers or copolymers of ethene
    • C09D123/08—Copolymers of ethene
    • C09D123/0846—Copolymers of ethene with unsaturated hydrocarbons containing other atoms than carbon or hydrogen atoms
    • C09D123/0853—Vinylacetate
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F210/00—Copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
    • C08F210/02—Ethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F255/00—Macromolecular compounds obtained by polymerising monomers on to polymers of hydrocarbons as defined in group C08F10/00
    • C08F255/02—Macromolecular compounds obtained by polymerising monomers on to polymers of hydrocarbons as defined in group C08F10/00 on to polymers of olefins having two or three carbon atoms
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/04—Homopolymers or copolymers of ethene
    • C08L23/08—Copolymers of ethene
    • C08L23/0846—Copolymers of ethene with unsaturated hydrocarbons containing atoms other than carbon or hydrogen
    • C08L23/0853—Ethylene vinyl acetate copolymers
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J123/00—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers
    • C09J123/02—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers not modified by chemical after-treatment
    • C09J123/04—Homopolymers or copolymers of ethene
    • C09J123/08—Copolymers of ethene
    • C09J123/0846—Copolymers of ethene with unsaturated hydrocarbons containing other atoms than carbon or hydrogen atoms
    • C09J123/0853—Vinylacetate
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2312/00—Crosslinking
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2666/00—Composition of polymers characterized by a further compound in the blend, being organic macromolecular compounds, natural resins, waxes or and bituminous materials, non-macromolecular organic substances, inorganic substances or characterized by their function in the composition
    • C08L2666/02—Organic macromolecular compounds, natural resins, waxes or and bituminous materials
    • C08L2666/24—Graft or block copolymers according to groups C08L51/00, C08L53/00 or C08L55/02; Derivatives thereof
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L51/00—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
    • C08L51/06—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond

Definitions

  • the present invention relates to a process for the preparation of copolymers of ethylene which, in addition to ethylene, contain a second and, in minor amounts, a third monomer, and to copolymers of a certain composition with high peel strengths and their use as adhesion promoters and adhesives.
  • the process for producing leads to copolymers which, in addition to 70 to 50% by weight of ethylene, 30 to 50% by weight of vinyl acetate and 100 parts by weight of ethylene / vinyl acetate copolymer each, contain up to 5 parts by weight of a third monomer .
  • the third monomer is maleic anhydride, maleic acid, fumaric acid, acrylic acid or methacrylic acid.
  • copolymers which consist of 50 to 70% by weight of ethylene and 30 to 50% by weight of vinyl acetate and have a melt index (190 / 2.16) of 9 to 300 (g / 10 min), with the third monomer and an organic peroxide.
  • a melt index 190 / 2.16
  • 9 to 300 g / 10 min
  • Per 100 parts by weight of copolymer 0.5 to 25 parts by weight of the third monomer and 0.01 to 10.0 parts by weight of the organic peroxide are used, if appropriate in the presence of a solvent.
  • the resulting ternary copolymer has a composition corresponding to the copolymerized parts by weight of the three monomers and, compared to the copolymer used as the starting material, has a greatly reduced melt index (190 / 2.16) of 0.2 to 10 (g / 10 min) and one Peel strength of ⁇ 5N.
  • Copolymers of the above composition are of great interest in technology due to their properties. They can be used as adhesives and adhesion promoters, for sheathing cables and for producing highly adhesive layers, which can have different compositions.
  • copolymers for these uses are based on their good processability by means of extrusion, their adhesiveness particularly to metals, their peel strength, their resistance to heat, chemicals and weather influences and their ductility, which can also be used to produce relatively thin layers.
  • the copolymers can also be used for coextrusion blow bottle molds and for the production of films by means of coextrusion.
  • melt index (190 / 2.16) should therefore not exceed 10 (g / 10 min).
  • Ethylene copolymers of the composition and properties described cannot generally be produced by high-pressure synthesis.
  • a direct synthesis - starting from mixtures of the three monomers - is not possible, especially at higher vinyl acetate contents ( ⁇ 25% by weight).
  • copolymers with a low molecular weight corresponding to a melt index ⁇ 20 g / 10 min are obtained.
  • US 45 15 745 describes a process for reducing the melt index and modifying the rheological behavior of ethylene-vinyl acetate copolymers by adding small amounts of organic peroxides. This extends the polymer chains, but also links individual macromolecules together, i.e. a two-dimensional networking, bypassed. The process is limited to ethylene-vinyl acetate copolymers with a melt index (190 / 2.16) of less than 0.75 (g / 10 min) and a vinyl acetate content of 4 to less than 30% by weight as the starting material.
  • the older application DE 37 32 722.4 describes a production process which is aimed exclusively at ethylene-vinyl acetate copolymers.
  • the ungrafted copolymers contain at least 40% by weight of vinyl acetate. They are produced by reacting copolymers of the same composition at 160 to 220 ° C. with 0.02 to 0.5% by weight of an organic peroxide, based on the copolymer, in an extruder. This reduces the melt index (190 / 2.16) from originally 30 to 300 to 3.0 (g / 10 min) and less.
  • the composition of the end product corresponds to that of the ethylene-vinyl acetate copolymer used.
  • the peroxides should decompose within 1 to 4 minutes under the reaction conditions.
  • EP-A-0 225 067 relates to a process for the preparation of grafted butyl acrylate-containing copolymers. Because of processing problems, the acrylate content should be set as low as possible. Corresponding graft copolymers have only moderate adhesive properties.
  • the US-A-4 440 911 describes a grafting process, wherein only LLDPE is used as the base polymer.
  • This polyethylene which is characterized by a linear chain structure due to its synthesis and also has no ester-containing groups, is also characterized by weak adhesive properties.
  • the object of the invention is to provide a process for the preparation of copolymers of ethylene which have excellent adhesive properties (peel strength) and at the same time have a melt index (190 / 2.16) of 10 (g / 10 min) and less.
  • melt index can be set to a predetermined value from the start and the peel strength can be varied independently of this.
  • peel strength can be set to a desired size and the melt index can be adjusted according to the requirements. Which way of working is preferred depends on the respective circumstances. In this way, copolymers are accessible with any combination of melt index and peel strength. The user is thus able to specifically produce a copolymer that is tailored to his specific problem.
  • the above object is achieved by a process for the preparation of copolymers of ethylene with vinyl acetate as the second monomer and a third monomer, with a melt index (190 / 2.16) of 0.1 to 10 (g / 10 min). It is characterized in that a copolymer of 70 to 50% by weight of ethylene and 30 to 50% by weight of vinyl lactate with a melt index (190 / 2.16) of 9 to 300 (g / 10 min) with 0, 5 to 25 parts by weight of maleic anhydride, maleic acid, fumaric acid, acrylic acid or methacrylic acid as the third monomer per 100 parts by weight of copolymer at 130 to 220 ° C. in the presence of 1.0 to 10.0 parts by weight per 100 parts. - Parts copolymer of a peroxide disintegrating under the reaction conditions within 1 to 30 minutes and a solvent.
  • the new process succeeds in increasing both the molecular weight of the copolymer used and that of the ternary copolymer formed, this increase not being due to crosslinking but rather to an extension of the molecular chains. It is important here that, contrary to the teaching of the prior art, radical-forming substances can be used in a relatively high concentration. Furthermore, it was not expected under these conditions the low molecular weight copolymers and the ternary copolymers which form do not give rise to crosslinking.
  • the melt index of the copolymers prepared according to the invention is always considerably lower than that of the copolymer used in each case.
  • the third monomer is incorporated into the copolymer and brings about a significant increase in the peel strength.
  • the starting material for the process according to the invention are copolymers which consist of 70 to 50% by weight of ethylene and 30 to 50% by weight of vinyl acetate. They have a melt index (190 / 2.16) of 9 to 300, in particular 20 to 200, preferably 40 to 150 (g / 10 min).
  • the melt index is understood to mean the amount of copolymer (starting material and end product) which, in accordance with DIN 53 735, is pressed through an 8 mm long nozzle of 2.095 mm in diameter under an application pressure of 2.16 kg at 190 ° C. within 10 minutes. It is given in g / 10 min.
  • the peel strength of polyethylene-clad pipes is defined as the force required to peel a particular strip of the polyethylene cladding over a defined peel path. It indicates the force per tear length that is required to loosen the bond. A distinction is made between marking and tearing force. The latter is of primary importance for the adhesive strength of a system.
  • Aluminum sheets serve as the component to be bonded.
  • the peel strength is determined with a Zwick tearing machine (vertical design), in whose clamping jaws the surfaces (30 x 100 mm2) of the composite system angled by 90 ° are clamped.
  • the actual adhesive surface 70 x 100 mm2 is perpendicular to the jaws.
  • the train speed is 50 mm / min.
  • the tearing or peeling forces that occur are recorded by means of a recorder.
  • the copolymers used as starting materials can be prepared by known processes by polymerizing monomer mixtures under high pressure. Pressures of 200 to 300 MPa and temperatures of 150 to 250 ° C are suitable conditions.
  • the polymerization is carried out in autoclaves or in tubular reactors which can have lines for feeding in cold gas.
  • the reaction takes place in the presence of initiators, i.e. H. in the presence of radical-forming substances such as peroxides or oxygen.
  • moderators is unnecessary in cases where the second monomer itself has a moderating effect according to its concentration. Sometimes it proves expedient to add a dilute hydroquinone solution to the reaction mixture in order to stabilize the temperature control. It is important to ensure that the stabilizer concentration is not too high in order to avoid a hindrance to the build-up reaction (chain extension).
  • the copolymer is mixed with the third monomer and the radical-forming substance, if appropriate in the presence of a solvent, as homogeneously as possible and the mixture is usually heated to 130 to 220 ° C.
  • the reaction temperature is to be adapted to the decay characteristics of the radical-forming substance used in each case.
  • Organic peroxides are used in particular as radical-forming substances.
  • 0.5 to 5, in particular 0.9 to 4, preferably 1 to 3 parts by weight of the third monomer are added and polymerized in per 100 parts by weight of copolymer.
  • 5 to 25, in particular 8 to 23, preferably 10 to 20 parts by weight of the third monomer are added to 100 parts by weight of copolymer.
  • the increased proportion of the third monomer is necessary so that about 0.5 to 5, in particular 0.9 to 4, preferably 1 to 3 parts by weight of third monomer per 100 parts by weight of copolymer are copolymerized into the copolymer.
  • maleic anhydride, fumaric acid, acrylic acid or methacrylic acid in particular maleic anhydride, fumaric acid or acrylic acid, preferably maleic anhydride or acrylic acid, is particularly suitable as the third monomer.
  • the amount of peroxide generally influences the speed of chain extension on the one hand and the degree of chain extension on the other. Relatively low peroxide concentrations lead relatively slowly to products with a comparatively high melt index. On the other hand, if you want to manufacture products with a particularly low melt index, it is advisable to use higher amounts of peroxide.
  • the process according to the invention can be carried out both in the absence of an additional solvent and in the presence of an additional solvent.
  • Aliphatic and / or aromatic hydrocarbons, paraffin oil, xylene, esters of aliphatic and / or aromatic carboxylic acids, in particular alkyl acetates, can be used as solvents.
  • the ratio of solvent: copolymer should be 3: 1 to 8: 1, in particular 4: 1 to 7: 1, preferably 4.3: 1 to 5.5: 1 parts by weight.
  • the reaction temperatures are relatively low, they are 130 to 200, in particular 135 to 180, preferably 140 to 160 ° C.
  • the disintegration time of the peroxide to be used is, depending on the reaction temperatures, about 1 to 30 minutes, it can also be longer.
  • the peroxide requirement in the process is quite high due to the additional solvent. About 1.0 to 10, in particular 2 to 8 parts by weight of peroxide must be added per 100 parts by weight of copolymer. The required amount of peroxide can be added at once or (in many cases advantageously) in several identical or different portions during the reaction.
  • the gradual addition of the peroxide has a favorable effect on the quality of the end product, in particular on a reduction in the number of specks.
  • Organic solvents in which the copolymer is not soluble are suitable as precipitants. These include lower alcohols and ketones.
  • reaction temperatures can be used. Temperatures of 160 to 220, in particular 170 to 210 ° C. are usually sufficient. Reaction temperatures of 180 to 200 ° C have proven particularly useful.
  • the decomposition time of the peroxide to be used is 1 to 10, in particular 1 to 4 minutes.
  • the peroxide requirement is very low compared to working with solvents. Per 100 parts by weight of copolymer, 0.01 to 1.0, in particular 0.02 to 0.5, preferably 0.05 to 0.3 parts by weight of peroxide are sufficient.
  • the peroxide can be added to the copolymer as a pure substance or in dissolved form.
  • the peroxide is dissolved in a solvent which advantageously does not dissolve the copolymer, the solution is added to the copolymer and mixed. The solvent is then removed, for example by evaporation. The copolymer pretreated in this way is then fed to the reaction.
  • Peroxides which decompose within 1 to 4 minutes at 160 to 220, in particular 170 to 210, preferably 180 to 200 ° C. are particularly suitable.
  • Peroxides which can be used particularly are 2,5-dimethyl-2,5-bis (tert-butylperoxy) hexane and / or 1,1-bis (tert-butylperoxy) cyclohexane.
  • the need for a third monomer is very low compared to working with solvents. 0.5 to 5, in particular 0.9 to 4, preferably 1 to 3 parts by weight of third monomer are added to each 100 parts by weight of copolymer. This amount is sufficient since the third monomer reacts quantitatively or almost completely with the copolymer to form the copolymer.
  • the process according to the invention can be carried out in an extruder, in particular in the absence of a solvent.
  • the required reaction temperature is set by heating the extrusion die.
  • the residence time of the product mixture (starting materials and already formed ternary copolymer) in the extruder is several minutes, in particular 1 to 10, preferably 2 to 5 minutes.
  • a pressure of approximately 0.05 to 2.0 MPa usually arises during the extrusion. However, depending on the type and mode of operation of the extruder, higher and lower pressures can also occur.
  • a portionwise addition of the peroxide through two or more openings in the extruder die reduces the number of specks.
  • the copolymer is mixed, if appropriate in the presence of a solvent, with the corresponding amounts of peroxide and third monomer and this mixture is reacted, the peroxide and third monomer reacting simultaneously with the copolymer.
  • the present invention furthermore relates to copolymers consisting of 70 to 50% by weight of ethylene, 30 to 50% by weight of vinyl acetate and 0.5 to 5 parts by weight of maleic anhydride and maleic acid per 100 parts by weight of ethylene / vinyl acetate copolymer , Fumaric acid or methacrylic acid, with a melt index (190 / 2.16) of 0.1 to 10 (g / 10 min).
  • copolymers which are characterized in that, in addition to ethylene, they contain 32 to 48, in particular 35 to 45,% by weight of vinyl acetate and 100 parts by weight of ethylene / vinyl acetate copolymer 0.7 to 4.5, in particular 0.9 to 4, preferably 1 to 3 parts by weight of maleic anhydride, maleic acid, fumaric acid, acrylic acid or methacrylic acid.
  • copolymers described above are particularly suitable if they contain maleic anhydride, fumaric acid, acrylic acid or methacrylic acid, in particular maleic anhydride, fumaric acid or acrylic acid, preferably maleic anhydride or acrylic acid, as the third monomer.
  • melt index 190 / 2.16
  • peel strength ⁇ 25, in particular ⁇ 28 to ⁇ 50, in particular ⁇ 40 N. .
  • the peel strength is influenced by the vinyl acetate content and the proportion of the third monomer, in particular maleic anhydride, higher amounts of vinyl acetate and the third monomer result in an increase in the peel strength, a reduction in their proportion results in a reduction in the peel strength.
  • the peel strength surprisingly increases (for a given vinyl acetate content) depending on the amount of the third monomer up to a maximum, which is about 3 parts by weight of the third monomer per 100 parts by weight of copolymer, but higher amounts again lead to a reduction in the Peel strength.
  • the copolymers can be used for the coextrusion, lamination and improvement of the toughness of polymer mixtures (blends), enamel compositions and for powder coating.
  • a copolymeric solution of maleic anhydride (20 g maleic anhydride (MSA) in 100 ml xylene) is then added dropwise to the copolymer solution at 135 ° C. with stirring over 10 minutes. The reaction mixture is then left for a further 2 hours with stirring at 140.degree.
  • the mixture is then cooled, the copolymer precipitates out by adding about 2000 ml of methanol, is filtered off and the precipitate is dried.
  • the copolymer thus impregnated with peroxide and maleic anhydride is fed via a shaking channel to a twin-screw extruder, the tool of which is set to a temperature profile of 160 to 200 ° C. by means of several heating zones.
  • the dwell time in the extruder is 1 to 5 minutes depending on the speed of the screw.
  • the extruded copolymer is passed as a strand through a water bath and granulated.

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Claims (19)

  1. Procédé de préparation de copolymères ternaires ou de terpolymères de l'éthylène avec l'acétate de vinyle comme second monomère et un troisième monomère, le terpolymère ayant un indice de fusion (190/2,16) de 0,1 à 10 (g/10 min), procédé caractérisé en ce qu'on fait réagir un copolymère formé de 70 à 50 % en poids d'éthylène et de 30 à 50 % en poids d'acétate de vinyle, ayant un indice de fusion (190/2,16) de 9 à 300 (g/10 min) avec 0,5 à 25 parties en poids d'anhydride de l'acide maléique, d'acide maléique, d'acide fumarique, d'acide acrylique ou d'acide méthacrylique comme troisième monomère pour 100 parties en poids du copolymère, à 130 jusqu'à 220°C en présence de 1,0 à 10,0 parties en poids pour 100 parties en poids du copolymère, d'un peroxyde qui se décompose en l'espace de 1 à 30 minutes dans les conditions de réaction, et en présence d'un solvant.
  2. Procédé selon la revendication 1, caractérisé en ce qu'on fait réagir un copolymère et un troisième monomère en présence de 0,01 à 1,0 partie en poids, pour 100 parties en poids du copolymère, d'un peroxyde qui, dans les conditions de réaction, se décompose en l'espace de 1 à 30 minutes, en opérant en présence d'un solvant.
  3. Procédé selon la revendication 1, caractérisé en ce qu'on conduit la réaction à 135 jusqu'à 180, notamment à 140 jusqu'à 160°C.
  4. Procédé selon la revendication 2, caractérisé en ce qu'on conduit la réaction à 160 jusqu'à 220, notamment à 170 jusqu'à 210, de préférence à 180 jusqu'à 210, de préférence à 180 jusqu'à 200°C.
  5. Procédé selon la revendication 1 ou 3, caractérisé en ce qu'on fait réagir le copolymère avec 5 à 25, notamment 8 à 23, de préférence 10 à 20, parties en poids du troisième monomère pour 100 parties en poids du copolymère.
  6. Procédé selon la revendication 2 ou 4, caractérisé en ce qu'on fait réagir le copolymère avec 0,5 à 5,0, notamment 0,9 à 4, de préférence 1 à 3, parties en poids du troisième monomère pour 100 parties en poids du copolymère.
  7. Procédé selon une ou plusieurs des revendications 1 à 6, caractérisé en ce qu'on utilise comme troisième monomère l'anhydride de l'acide maléique, l'acide fumarique, l'acide acrylique ou l'acide méthacrylique, notamment l'anhydride de l'acide maléique, l'acide fumarique ou l'acide acrylique, de préférence l'anhydride de l'acide maléique ou l'acide acrylique.
  8. Procédé selon une ou plusieurs des revendications 1, 3, 5, 7, caractérisé en ce qu'on utilise 1 à 10, notamment 2 à 8, parties en poids du peroxyde pour 100 parties en poids du copolymère.
  9. Procédé selon une ou plusieurs des revendications 2, 4, 6, 7, caractérisé en ce qu'on utilise 0,02 à 0,5, notamment 0,05 à 0,3, partie en poids du peroxyde pour 100 parties en poids du copolymère.
  10. Procédé selon une ou plusieurs des revendications 1 à 9, caractérisé en ce qu'on utilise un peroxyde qui se décompose en l'espace de 1 à 4 minutes à une température de 160 à 220, notamment de 170 à 210 et de préférence de 180 à 200°C.
  11. Procédé selon une ou plusieurs des revendications 1 à 10, caractérisé en ce qu'on utilise comme peroxyde le 2,5-diméthyl-2,5-bis-(tert.-butylperoxy)-hexane et/ou le 1,1-bis-(tert.-butylperoxy)-cyclohexane.
  12. Procédé selon une ou plusieurs des revendications 1 à 11, caractérisé en ce qu'on conduit la réaction dans une extrudeuse sans solvant.
  13. Procédé selon une ou plusieurs des revendications 1 à 12, caractérisé en ce qu'on fait réagir le copolymère simultanément avec le troisième monomère et avec le peroxyde.
  14. Procédé selon une ou plusieurs des revendications 1 à 12, caractérisé en ce qu'on fait réagir le copolymère tout d'abord avec le peroxyde puis avec le troisième monomère.
  15. Procédé selon une ou plusieurs des revendications 1 à 12, caractérisé en ce qu'on fait réagir le copolymère avec le troisième monomère puis avec le peroxyde.
  16. Copolymère ternaire ou terpolymère consistant en 60 à 50 % en poids d'éthylène, 40 à 50 % en poids d'acétate de vinyle et, pour 100 parties en poids à chaque fois du copolymère d'éthylène/acétate de vinyle, 0,5 à 5 parties en poids d'anhydride de l'acide maléique, d'acide maléique, d'acide fumarique, d'acide acrylique ou d'acide méthacrylique, ce copolymère ternaire ayant un indice de fusion (190/2,16) de 0,1 à 10 (g/10 min).
  17. Copolymères ternaires ou terpolymères selon la revendication 16, caractérisé en ce qu'ils contiennent de l'anhydride d'acide maléique, de l'acide fumarique, de l'acide acrylique ou de l'acide méthacrylique, notamment l'anhydride d'acide maléique, de l'acide fumarique ou de l'acide acrylique, de préférence de l'anhydride de l'acide maléique ou de l'acide acrylique.
  18. Copolymères ternaires ou terpolymères selon la revendication 16 ou 17, caractérisé en ce qu'ils présentent un indice de fusion (190/2,16) de 0,15 à 8, notamment de 0,2 à 5 (g/10 min).
  19. Utilisation des copolymères ternaires ou des terpolymères pour la coextrusion, la stratification et l'amélioration de la viscosité ou de la ténacité de mélanges ou alliages ("Blends"), de masses fondues et pour le revêtement de métaux.
EP90102276A 1988-08-10 1990-02-06 Procédé de préparation de copolymères d'éthylène à haute résistance à l'impact Expired - Lifetime EP0440840B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AT90102276T ATE126809T1 (de) 1990-02-06 1990-02-06 Verfahren zur herstellung von mischpolymerisaten des ethylens mit hoher schälfestigkeit.
DE59009556T DE59009556D1 (de) 1990-02-06 1990-02-06 Verfahren zur Herstellung von Mischpolymerisaten des Ethylens mit hoher Schälfestigkeit.

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Application Number Priority Date Filing Date Title
DE3827056A DE3827056A1 (de) 1988-08-10 1988-08-10 Verfahren zur herstellung von mischpolymerisaten des ethylens mit hoher schaelfestigkeit

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EP0440840A2 EP0440840A2 (fr) 1991-08-14
EP0440840A3 EP0440840A3 (en) 1991-10-30
EP0440840B1 true EP0440840B1 (fr) 1995-08-23

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3827056A1 (de) * 1988-08-10 1990-02-15 Hoechst Ag Verfahren zur herstellung von mischpolymerisaten des ethylens mit hoher schaelfestigkeit
DE4342672A1 (de) * 1993-12-15 1995-06-22 Akzo Nobel Nv Haftverbesserer
US5827608A (en) * 1996-10-28 1998-10-27 Minnesota Mining And Manufacturing Company Method of forming a thermoplastic layer on a flexible two-dimensional substrate and powder for preparing same
EP1062054A1 (fr) 1998-03-11 2000-12-27 Minnesota Mining And Manufacturing Company Procede de formation d'une couche thermoplastique sur une couche d'adhesif
US6319978B1 (en) * 1998-10-01 2001-11-20 Air Products And Chemicals, Inc. Water borne pressure sensitive vinyl acetate/ethylene adhesive compositions
CN116574209A (zh) * 2023-06-06 2023-08-11 江苏扬农化工集团有限公司 一种烯烃功能聚合物的制备方法及其应用

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2450672A1 (de) * 1974-10-25 1976-05-06 Basf Ag Verfahren zur herstellung von pfropfpolymerisaten
JPS58445B2 (ja) * 1975-10-17 1983-01-06 三井化学株式会社 熱可塑性エラストマ−の製造方法
JPS5457544A (en) * 1977-10-15 1979-05-09 Nippon Telegr & Teleph Corp <Ntt> Hot-melt adhesive composition for metal and polyolefin
JPS6036217B2 (ja) * 1981-04-07 1985-08-19 東亜燃料工業株式会社 変性ポリエチレン組成物
FI80892C (fi) * 1985-11-21 1990-08-10 Neste Oy Kemiskt modifierad etenkopolymer.
FI79124C (fi) * 1986-05-28 1989-11-10 Neste Oy Modifierad polyolefin.
DE3827056A1 (de) * 1988-08-10 1990-02-15 Hoechst Ag Verfahren zur herstellung von mischpolymerisaten des ethylens mit hoher schaelfestigkeit

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EP0440840A2 (fr) 1991-08-14
DE3827056A1 (de) 1990-02-15
EP0440840A3 (en) 1991-10-30

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